Product/Statistic

Control

10% Replacement

20% Replacement

30% Replacement

Mean

7.50^a

7.80^a

7.30^b

6.70^c

Standard Deviation

0.90

1.37

1.37

1.66

Median

7.50

7.50

7.50

7.00

Minimum

6.00

5.00

5.00

2.00

Maximum

9.00

9.00

9.00

9.00